build: bump yarn to 3.8.7

[aresnik11]

Overview

Bumps yarn to 3.8.7 to match mono. Note: probably won't merge this and instead will branch off of it to bump to yarn 4

PR Checklist

• Related to designs:
• Related to JIRA ticket: GMT-1464
• I have run this code to verify it works
• This PR includes unit tests for the code change
• This PR includes testing instructions tests for the code change
• The alpha package of this PR is passing end-to-end tests in all relevant Codecademy repositories

Testing Instructions

1. Go to storybook preview
2. Confirm everything works as expected
3. Pull the branch locally
4. Go to storybook
5. Confirm everything works as expected
6. Confirm the alpha works in mono/lith
7. Finish and do a celebratory dance

PR Links and Envs

Repository	PR Link
Monolith	Monolith PR
Mono	Mono PR

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 98a373f

---

☁️ Nx Cloud last updated this comment at 2025-12-16 19:19:06 UTC

[codecademydev]

📬 Published Alpha Packages:

eslint-plugin-gamut@2.4.1-alpha.db5e20.0
@codecademy/gamut@67.6.1-alpha.db5e20.0
@codecademy/gamut-icons@9.53.1-alpha.db5e20.0
@codecademy/gamut-illustrations@0.57.1-alpha.db5e20.0
@codecademy/gamut-kit@0.6.574-alpha.db5e20.0
@codecademy/gamut-patterns@0.10.20-alpha.db5e20.0
@codecademy/gamut-styles@17.11.1-alpha.db5e20.0
@codecademy/gamut-tests@5.2.18-alpha.db5e20.0
@codecademy/variance@0.25.1-alpha.db5e20.0

[github-actions]

🚀 Styleguide deploy preview ready!

Preview URL: https://6941b15ee4b3c05973e8acee--gamut-preview.netlify.app
Deploy Logs: https://app.netlify.com/projects/gamut-preview/deploys/6941b15ee4b3c05973e8acee